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E urgent
a+b=33 a+c=43 5a+2b+3c=


Răspuns :

a+b=33
a+c=43
5a+2b+3c=(2a+2b)+(3a+3c)=2 (a+b)+3 (a+c)=2×33+3×43=66+129=195
5a+2b+3c=
=2a+3a+2b+3c=
=2a+2b+3a+3c=
=2(a+b)+3(a+c)=
=2×33+3×43=
=66+129=
=[tex] \boxed{195}[/tex]